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TABLE 4 <br /> ' SUMMARY OF CHEMICALS OF POTENTIAL CONCERN <br /> SURLAND HOMES-BRIDLE CREEK <br /> Tracy,San Joaquin County,California <br /> ' Construction <br /> Residential Residential Worker <br /> Maximum Scenario 1 Scenario 2 Scenario <br /> ' Number of Soil Number of Detected EPC Cs EPC Cs EPC Cs <br /> COPC Samples Detects Conc'n (mg/kg) m k ) (m /k ) Statistical Method' <br /> BTEX <br /> Toluene 14 1 0.001 0.0010 0.0010 0.0030 Median <br /> ' Eth Ibenzenc 14 1 0.007 0.0070 0.0070 0.0030 Median <br /> Total X lens 14 2 0.005 0.0050 0.0010 0.0030 Median <br /> PAHs <br /> Acenaphthene 14 7 0.29 0.29 0.21 0.18 95%KM Percentile Bootstrap)UCL <br /> ' Anthracene 14 10 0.26 0.26 0.23 0.14 95%KM Percentile Bootstrap)UCL <br /> Benzo a anthracene 14 8 0.19 0.19 0.031 0.058 95%KM BCA UCL <br /> Bcnzoa enc 14 6 0.011 0.011 0.007 0.0063 95%KM Percentile Bootstrap)UCL <br /> Benzo b fluoranthenc 14 10 0.056 0.056 0.055 0.054 95%KM Cheb shev UCL <br /> Benzo(g,h,i)perylcnc 14 7 0.21 0.21 0.078 0.058 95%KM t UCL <br /> Benzo k fluoranthene 14 2 0.00067 0.00067 0.00067 0.0067 Median <br /> Chryscme 14 10 0.11 0.11 0.11 0.063 95%KM t UCL <br /> Dibenz a,h anthracene 14 2 0.0073 0.0073 0.0067 0.0073 95%KM(%Bootstrap)UCL <br /> Fluoranthcne 14 10 0.068 0.068 0.066 0.039 95%KM t UCC <br /> ' Fluorene 14 7 0.87 0.87 0.70 0.57 95%KM Percentile Bootstrap)UCL <br /> Na hthalene 14 11 1.9 1.9 0.61 1.1 97.5%KM Cheb shev UCL <br /> Phenanthrene 14 10 1.2 1.2 0.88 0.60 95%KM t UCL <br /> Pyrene 14 10 0.19 0.19 0.19 0.099 95%KM t UCL <br /> METALS <br /> Barium 14 14 230 230 223 211 95%Student's-t UCL <br /> Beryllium 14 14 0.94 0.94 0.93 0.82 95%Student's-t UCL <br /> Chromium III 14 14 48 48 47 44 95%Student's-t UCL <br /> ' Cobalt 14 14 14 14 13 12 95%Student's-t UCL <br /> Copper 14 14 185 185 122 103 95%Cheb hev Mean,Sd UCL <br /> Lead 14 14 40 40 12 16 95%Modified-t UCL <br /> Mercury 14 3 0.019 0.019 0.015 0.014 95%KM [ UCL <br /> ' <br /> Molybdenum 14 14 1.0 1.0 0.82 0.71 957/-oA-pproximte Gamma UCL <br /> Nickel 14 14 43 43 42 39 95%Student's-t UCL <br /> Vanadium 14 14 82 82 81 76 95%Student's-t UCL <br /> Zinc 14 14 143 143 113 85 95%Modified-t UCL <br /> ' Abbreviations: <br /> BCA=Bias-Corrected Accelerated Percentile Bootstrap method <br /> COPC-Constituent of potential concern <br /> ' Ca=Concentration in soil,mg/kg <br /> EPC=Exposure point concentration <br /> KM=Kaplan-Meier nonparametric estimation method <br /> UCL=Upper confidence limit <br /> Now: <br /> 1.. ProUCL Version 4.00.05 was used to calculate exposure point concentrations for the construction worker scenario;where the software identified more than one <br /> appropriate UCL value,the higher value was used in this evaluation. <br /> 1 <br /> ' Page 1 of 1 SAI`: <br />